package com.zxl.security.core.validate.code;

import com.zxl.security.core.social.properties.SecurityConstants;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.social.connect.web.HttpSessionSessionStrategy;
import org.springframework.social.connect.web.SessionStrategy;
import org.springframework.stereotype.Component;
import org.springframework.web.bind.ServletRequestBindingException;
import org.springframework.web.bind.ServletRequestUtils;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.filter.OncePerRequestFilter;

import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@Component("validateCodeFilter")
@Slf4j
public class ValidateCodeFilter extends OncePerRequestFilter implements InitializingBean {
    private final static String SESSION_KEY = "image_key";
    @Autowired
    private AuthenticationFailureHandler authenticationFailureHandler;
    private SessionStrategy sessionStrategy = new HttpSessionSessionStrategy();

    @Override
    public void afterPropertiesSet() throws ServletException {
        super.afterPropertiesSet();
        log.info(">>>配置属性设置之后...");
    }

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
        if (StringUtils.equals(SecurityConstants.DEFAULT_LOGIN_PROCESSING_URL_FORM, request.getRequestURI())) {
            try {
                validate(new ServletWebRequest(request));
            } catch (ValidateCodeException e) {
                authenticationFailureHandler.onAuthenticationFailure(request, response, e);
                return;
            }
        }
        filterChain.doFilter(request, response);
    }

    private void validate(ServletWebRequest request) throws ServletRequestBindingException {
        ValidateCode codeInSession = (ValidateCode) sessionStrategy.getAttribute(request, SESSION_KEY);
        String codeInRequest = ServletRequestUtils.getStringParameter(request.getRequest(), "imageCode");
        if (StringUtils.isEmpty(codeInRequest)) {
            throw new ValidateCodeException("验证码的值不能为空");
        }
        if (codeInSession == null) {
            throw new ValidateCodeException("验证码不存在");
        }
        if (codeInSession.isExpired()) {
            sessionStrategy.removeAttribute(request, SESSION_KEY);
            throw new ValidateCodeException("验证码已过期");
        }
        if (!StringUtils.equalsIgnoreCase(codeInSession.getCode(), codeInRequest)) {
            throw new ValidateCodeException("验证码不匹配");
        }
        sessionStrategy.removeAttribute(request, SESSION_KEY);
    }
}
